If yesterday’s energy and money saving free software was not exactly what you wanted, please try these.  Both are FREE, of course.
http://www.energystar.gov/index.cfm?c=power_mgt.pr_power_mgt_ez_wiz
http://co2saver.snap.com/
http://desktop.google.com/plugins/i/energysaver.html
Don’t forget you can save even more energy and money with Powertune Energy Saver.
ecoanne, The Energy LadyUK